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A Phase 1a/1b Dose Escalation and Expansion Trial of PF-0791800 (TTI-621), a Novel Biologic Targeting CD47, in Subjects With Relapsed or Refractory Hematologic Malignancies and Selected Solid Tumors

Trial Profile

A Phase 1a/1b Dose Escalation and Expansion Trial of PF-0791800 (TTI-621), a Novel Biologic Targeting CD47, in Subjects With Relapsed or Refractory Hematologic Malignancies and Selected Solid Tumors

Status: Discontinued
Phase of Trial: Phase I

Latest Information Update: 28 Jul 2023

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At a glance

  • Drugs Ontorpacept (Primary) ; Nivolumab; Rituximab
  • Indications Acute myeloid leukaemia; Acute promyelocytic leukaemia; B-cell lymphoma; Chronic lymphocytic leukaemia; Cutaneous T-cell lymphoma; Diffuse large B cell lymphoma; Follicular lymphoma; Haematological malignancies; Hodgkin's disease; Lymphoma; Mantle-cell lymphoma; Multiple myeloma; Mycosis fungoides; Myelodysplastic syndromes; Myeloproliferative disorders; Peripheral T-cell lymphoma; Precursor cell lymphoblastic leukaemia-lymphoma; Sezary syndrome; Small cell lung cancer; Solid tumours; T-cell lymphoma
  • Focus Adverse reactions; First in man
  • Sponsors Pfizer
  • Most Recent Events

    • 21 Jul 2023 Number of treatment arms have been reduced from 17 to 16 by the removal of Experimental: Acute Lymphoblastic Leukemia arm. Indications like mycosis fungoides, sezary-syndrome and , Acute-promyelocytic-leukaemia are added.
    • 13 Mar 2023 Status changed from active, no longer recruiting to discontinued. Pfizer decided terminating study for administrative reasons on 22Mar2022 (stopping enrollment as of 15Apr2022). The decision wasn't due to safety concerns or requests from regulatory authorities.
    • 26 Jul 2022 Planned End Date changed from 1 Dec 2022 to 31 Dec 2022.
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